CN115318219B - Needle electrode discharge tube suitable for flash Joule heating process and Joule heating equipment - Google Patents
Needle electrode discharge tube suitable for flash Joule heating process and Joule heating equipment Download PDFInfo
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- CN115318219B CN115318219B CN202211246942.9A CN202211246942A CN115318219B CN 115318219 B CN115318219 B CN 115318219B CN 202211246942 A CN202211246942 A CN 202211246942A CN 115318219 B CN115318219 B CN 115318219B
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Abstract
The invention belongs to the technical field of electrical equipment, and particularly relates to a needle electrode discharge tube and a Joule heating device which are suitable for a flashing Joule heating process.
Description
Technical Field
The invention belongs to the technical field of electrical equipment, and particularly relates to a needle electrode discharge tube suitable for a flash Joule heating process and Joule heating equipment.
Background
A new process developed by lisi university can extract valuable metals from electronic waste. This process is called flash joule heating, which consumes 500 times less energy than current methods. Flash joule heating was originally graphene produced from carbon using sources such as waste foods. However, lisi researchers have tuned methods for recovering minerals from electronic waste such as sodium, platinum, gold, and silver. The principle of operation of this method is to heat the electronic waste to a temperature of 3,400 kelvin (5,660 degrees fahrenheit). This high temperature evaporates the metal. The gas is then transported from the flash chamber into the cold trap by vacuum. Once in the cold trap, the metal gas condenses back into solid metal. The recovered metal mixture in the trap may then be further purified to produce individual metals.
In addition to retrieving metal from electronic waste, researchers have also found that the flash joule reaction reduces lead concentration in burnt remains to below 0.05 parts per million. This is a level of safety sufficient to allow the waste to be disposed of in agricultural soil. The content of other toxic metals, such as arsenic and mercury, can also be reduced by using additional flashes. This can be done quickly since each flash lasts less than one second. This process can turn the main source of toxic waste into a useful resource where the largest source of waste becomes a reserve, which will reduce the necessity of mining, stripping the earth's surface and utilizing large amounts of water resources from ore in remote and dangerous locations.
Aiming at the situation that various carbon sources are used for producing graphene by utilizing a flash Joule heating process, the prior art lacks a discharge tube capable of meeting the requirement of mass production of graphene, lacks Joule heating equipment capable of guaranteeing the continuous discharge working efficiency of the discharge tube, the traditional Joule heating equipment is difficult to reach the temperature above 3000K instantly, the discharge energy, the discharge voltage and the discharge time are uncontrollable, and the discharge temperature is difficult to monitor.
Disclosure of Invention
The present invention aims to overcome at least one of the above problems in the prior art and to provide a needle electrode discharge tube and a joule heating device suitable for use in a flash joule heating process.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
the invention provides a needle electrode discharge tube suitable for a flash Joule heating process, which comprises an upper electrode, an upper tube body, a lower tube body and a lower electrode, wherein the upper tube body and the lower tube body are open tube bodies, the outer diameter of the upper tube body is matched with the inner diameter of the lower tube body, the upper electrode is arranged at the end part of the upper tube body far away from the opening, the lower electrode is arranged at the end part of the lower tube body far away from the opening, a plurality of needle electrodes which are uniformly distributed in the circumferential direction are formed in the part of the tube body where the upper electrode and the lower electrode are respectively positioned, and the positions of the needle electrodes in the upper electrode and the lower electrode are staggered.
Further, in the needle electrode discharge tube suitable for the flash joule heating process, the upper tube body and the lower tube body are ceramic tubes.
Further, in the needle electrode discharge tube to which the flash joule heating process is applied, the needle electrode is a platinum electrode.
The invention also provides a Joule heating device suitable for the flashing Joule heating process, which is characterized in that: the Joule heating device comprises a cart type rack, wherein a parallel capacitor group is arranged at the lower layer in the cart type rack;
the middle layer inside the cart type rack is provided with a vacuum pump, a direct current contactor, an adjustable power inductor, a power resistor, a freewheeling diode, a silicon controlled rectifier power supply and a low-voltage switch power supply; one end of an electrode of the direct current contactor is connected with the positive electrode of the parallel capacitor group through a wire, and the other end of the electrode of the direct current contactor is connected with the adjustable power inductor through a wire; the adjustable power inductor is a power inductor with the inductance value adjustable according to the discharge time requirement, and the two ends of the adjustable power inductor are connected with a power resistor and a freewheeling diode protection circuit in parallel;
the upper layer inside the cart type frame is provided with a vacuum experiment cabin, and the inside of the vacuum experiment cabin is provided with a needle electrode discharge tube through a discharge clamp.
Further, in the joule heating device suitable for the flash joule heating process, each electrode of the parallel capacitor group is provided with a bleeder resistor in parallel, the negative electrode of the parallel capacitor group is connected to the negative electrode interface of the vacuum experiment cabin by a lead, and the output end of the adjustable power inductor is connected to the positive electrode interface of the vacuum experiment cabin by a lead.
Further, in the joule heating equipment suitable for the flash joule heating process, the vacuum pump is connected to the upper cover of the vacuum experiment cabin through the vacuum pipeline, the vacuum pump provides a vacuum environment for the inside of the vacuum experiment cabin, and the upper cover of the vacuum experiment cabin is provided with the vacuum pressure gauge and the air inlet valve.
Further, in the joule heating device suitable for the flash joule heating process, the silicon controlled rectifier power supply provides charging current for the parallel capacitor group, and the low-voltage switching power supply provides control power for the whole device;
a circuit breaker, a voltmeter, an ammeter and an indicator lamp are arranged above the back of the cart type rack, and a quick discharge switch, a two-way remote control switch and a potentiometer are arranged below the back of the cart type rack;
the circuit breaker provides power supply on-off for the whole equipment; the voltmeter is connected in parallel with two poles of the parallel capacitor bank and is used for measuring the voltage of the parallel capacitor bank;
the ammeter is connected in series with the output end of the silicon controlled rectifier power supply and is used for measuring the charging current of the silicon controlled rectifier power supply to the parallel capacitor bank;
the indicator lamp is a small incandescent lamp, is connected in parallel with two poles of the parallel capacitor bank, and is used for assisting in indicating the energy storage condition of the parallel capacitor bank.
Further, in the joule heating device suitable for the flash joule heating process, the rapid discharge switch is connected in series with a power resistor, and the rapid discharge switch is connected to two poles of the parallel capacitor group and is used for rapidly discharging the residual electric energy in the parallel capacitor group;
one path of the two-path remote control switch is connected with a power supply interface of the silicon controlled rectifier power supply and used for controlling the start and stop of the silicon controlled rectifier power supply, and the other path of the two-path remote control switch is connected with a control end of the direct current contactor and used for controlling the on-off of the direct current contactor;
the potentiometer is connected to a control interface of the silicon controlled rectifier power supply and used for controlling the output current of the silicon controlled rectifier power supply.
Further, in the above joule heating device suitable for the flash joule heating process, the discharge fixture is composed of a bottom plate, a sliding block, a screw support, copper screws and springs, wherein the sliding block is installed on the bottom plate, the sliding block can freely slide left and right on the bottom plate and can be locked at any position, the screw support is fixed on the sliding block, the copper screws are installed on the screw support, the springs are installed on the copper screws, the copper screws are of a bilateral symmetry structure, and needle-shaped electrode discharge tubes are borne in the middle of the copper screws.
Further, in the joule heating device suitable for the flash joule heating process, the joule heating device is provided with a capacitive energy storage inductance power control system for guaranteeing continuous discharge working efficiency, and the capacitive energy storage inductance power control system comprises a silicon controlled rectifier power supply, a silicon controlled controller, an anti-reflux diode a, an optical coupling switch a, an adjustable power inductor, an inverter power supply controller, a needle electrode discharge tube, an optical coupling switch b, an anti-reflux diode b and a capacitor bank;
the silicon controlled rectifier power supply is connected with alternating current commercial power, and the silicon controlled rectifier controller controls the rectification output to supply power to the capacitor bank; the capacitance group discharges the needle electrode discharge tube through the series adjustable power inductor, the adjustable power inductor can adjust the inductance to control the discharge time, and the capacitance group realizes the control of power through capacity adjustment and the adjustment of the charging voltage;
the inverter power supply controller can feed back the stored energy after the power inductor works to the silicon controlled rectifier rectifying power supply for the next capacitor energy storage.
The beneficial effects of the invention are as follows:
1. the needle electrode discharge tube provided by the invention has reasonable structural design, the discharge tube mainly comprises an upper ceramic tube body and a lower ceramic tube body, the outer wall of the upper tube body can be embedded into the inner wall of the lower tube body to form a working discharge space, the upper-lower separation type structure is beneficial to rapid loading and discharging, the electrode in the discharge tube is a needle platinum electrode, and the temperature of more than 3000K can be reached in millisecond time by matching with a capacitor bank.
2. The Joule heating device provided by the invention is ultrahigh voltage discharge heating device, has the characteristics of controllable discharge energy, discharge voltage and discharge time, can measure the discharge time and discharge temperature, is automatically controlled or manually controlled in the whole process, has safe electrical performance, has better safety and controllability compared with the traditional Joule heating device, and provides guarantee for preparing graphene in batches and stably and controllably.
3. The discharging clamp of the Joule heating device has reasonable design, and all power supplies are disconnected before use, and the voltmeter and the indicator lamp are checked, so that the capacitor is in an unaddressed state. The needle electrode discharge tube is filled with target reactant (carbon source), the needle electrode discharge tube is placed in the middle of the discharge clamp, the distance between the sliding blocks is regulated, the copper screw heads are used for supporting the two ends, and the springs are in proper compression state. And placing the discharge fixture in a vacuum experiment cabin, connecting the two copper screws to positive and negative electrodes in the experiment cabin by using wires, and covering the upper cover. Closing the air inlet valve, switching on the equipment power supply, switching on the circuit breaker, and opening the vacuum pump. And observing the indication of the vacuum gauge, and closing the vacuum pump after the vacuum state is pumped. And opening a first path of remote control switch, and switching on a silicon controlled rectifier power supply to charge the capacitor. And observing the ammeter and the voltmeter, and adjusting the charging current by using a potentiometer. After the charging is carried out to the target voltage, the first path of remote control switch is turned off, and the silicon controlled rectifier power supply is turned off. And (3) opening the second path of remote control switch, switching on the direct current contactor, performing joule discharge on a target reactant (carbon source) instantaneously, and switching off the second path of remote control switch after the reaction is completed, and switching off the direct current contactor. Closing the circuit breaker, opening the air inlet valve, opening the upper cover after the pressure in the vacuum experiment cabin is balanced with the outside, and taking out the discharge clamp. And loosening the sliding block, and taking out the needle electrode discharge tube to obtain the prepared graphene.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a needle electrode discharge tube according to the present invention;
FIG. 2 is a schematic front view of a heating apparatus for a coke ear of the present invention;
FIG. 3 is a schematic side view of a portion of a joule heating apparatus in accordance with the present invention;
FIG. 4 is a schematic view of the structure of the discharging clamp according to the present invention;
FIG. 5 is a block diagram of a capacitive storage inductive power control system according to the present invention;
in the drawings, the list of components represented by the various numbers is as follows:
01-cart type rack, 02-parallel capacitor bank, 03-vacuum pump, 04-direct current contactor, 05-adjustable power inductor, 06-power resistor, 07-freewheeling diode, 08-silicon controlled rectifier power supply, 09-low voltage switch power supply, 10-vacuum experiment cabin, 11-discharge clamp, 12-discharge resistor, 13-negative electrode interface, 14-vacuum pipeline, 15-vacuum pressure gauge, 16-intake valve, 17-positive electrode interface, 18-circuit breaker, 19-voltmeter, 20-ammeter, 21-pilot lamp, 22-quick discharge switch, 23-two-way remote control switch, 24-potentiometer, 25-bottom plate, 26-slider, 27-screw bracket, 28-copper screw, 29-spring, 30-needle electrode discharge tube, 301-upper electrode, 302-upper tube body, 303-lower tube body, 304-lower electrode, 305-needle electrode.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a needle electrode discharge tube suitable for a flash joule heating process, where the needle electrode discharge tube 30 includes an upper electrode 301, an upper tube body 302, a lower tube body 303 and a lower electrode 304, the upper tube body 302 and the lower tube body 303 are open tube bodies, the outer diameter of the upper tube body 302 is matched with the inner diameter of the lower tube body 303, the upper electrode 301 is mounted at the end far from the opening of the upper tube body 302, the lower electrode 304 is mounted at the end far from the opening of the lower tube body 303, a plurality of needle electrodes 305 distributed uniformly in the circumferential direction are formed in the part of the tube body where the upper electrode 301 and the lower electrode 304 are located, and the positions of the needle electrodes 305 in the upper electrode 301 and the lower electrode 304 are staggered.
In this embodiment, the upper tube 302 and the lower tube 303 are ceramic tubes.
In this embodiment, the needle electrode 305 is a platinum electrode.
In this embodiment, the outer wall of the upper tube 302 may be embedded into the inner wall of the lower tube 303 to form a working discharge space, which is beneficial to rapid loading and discharging due to the structure design of the upper and lower release type.
Example two
As shown in fig. 2 and 3, the present embodiment provides a joule heating apparatus suitable for a flash joule heating process, which includes a cart-type frame 01, and a parallel capacitor bank 02 is installed at the lower layer inside the cart-type frame 01.
The middle layer in the cart type frame 01 is provided with a vacuum pump 03, a direct current contactor 04, an adjustable power inductor 05, a power resistor 06, a freewheeling diode 07, a silicon controlled rectifier power supply 08 and a low-voltage switching power supply 09; one end of an electrode of the direct current contactor 04 is connected with the positive electrode of the parallel capacitor group 02 through a wire, and the other end of the electrode is connected with the adjustable power inductor 05 through a wire; the adjustable power inductor 05 is a power inductor with an inductance value adjustable according to the discharge time requirement, and the two ends of the power inductor are connected with a power resistor 06 and a freewheeling diode 07 protection circuit in parallel.
The upper layer inside the cart type frame 01 is provided with a vacuum experiment cabin 10, and a needle electrode discharge tube 30 is arranged inside the vacuum experiment cabin 10 through a discharge clamp 11.
In this embodiment, each electrode of the parallel capacitor group 02 is parallel-connected with a bleeder resistor 12, the negative electrode of the parallel capacitor group 02 is connected to the negative electrode interface 13 of the vacuum experiment chamber 10 by a wire, and the output end of the adjustable power inductor 05 is connected to the positive electrode interface 17 of the vacuum experiment chamber 10 by a wire.
In this embodiment, the vacuum pump 03 is connected to the upper cover of the vacuum experiment chamber 10 by a vacuum pipe 14, the vacuum pump 03 provides a vacuum environment for the inside of the vacuum experiment chamber 10, and the upper cover of the vacuum experiment chamber 10 is provided with a vacuum pressure gauge 15 and an air inlet valve 16.
In this embodiment, the thyristor rectifier power supply 08 provides charging current for the parallel capacitor bank 02, and the low-voltage switching power supply 09 provides control power for the whole device;
a circuit breaker 18, a voltmeter 19, an ammeter 20 and an indicator lamp 21 are arranged above the back of the cart type stand 01, and a quick discharge switch 22, a two-way remote control switch 23 and a potentiometer 24 are arranged below the back of the cart type stand 01;
the circuit breaker 18 provides power on-off for the whole equipment; the voltmeter 19 is connected in parallel with two poles of the parallel capacitor group 02 and is used for measuring the voltage of the parallel capacitor group 02;
the ammeter 20 is connected in series with the output end of the thyristor rectifying power supply 08 and is used for measuring the charging current of the thyristor rectifying power supply 08 to the parallel capacitor group 02;
the indicator lamp 21 is a small incandescent lamp, is connected in parallel with two poles of the parallel capacitor group 02, and is used for assisting in indicating the energy storage condition of the parallel capacitor group 02.
In this embodiment, the fast discharging switch 22 is connected in series with a power resistor, and the fast discharging switch 22 is connected to two poles of the parallel capacitor group 02 for fast discharging the residual electric energy in the parallel capacitor group 02;
one path of the two-path remote control switch 23 is connected to a power supply interface of the silicon controlled rectifier power supply 08 and used for controlling the start and stop of the silicon controlled rectifier power supply 08, and the other path of the two-path remote control switch is connected to a control end of the direct current contactor 04 and used for controlling the on-off of the direct current contactor 04;
the potentiometer 24 is connected to the control interface of the scr rectifying power supply 08, and is used for controlling the output current of the scr rectifying power supply 08.
As shown in fig. 4, the discharge jig 11 is composed of a bottom plate 25, a slider 26, a screw holder 27, a copper screw 28, and a spring 29, the slider 26 is mounted on the bottom plate 25, the slider 26 can slide left and right freely on the bottom plate and can be locked at any position, the screw holder 27 is fixed on the slider 26, the copper screw 28 is mounted on the screw holder 27, the spring 29 is mounted on the copper screw 28, the copper screw 28 has a laterally symmetrical structure, and the needle electrode discharge tube 30 is supported in the middle. The outer ends of the upper tube body 302 and the lower tube body 303 in the needle electrode discharge tube 30 are respectively provided with a connecting seat, and the inner ends of the copper screws 28 at both sides are limited in the corresponding connecting seats in a rotating way, so that the needle electrode discharge tube 30 can be opened and closed by the copper screws 28.
As shown in fig. 5, the joule heating device is provided with a capacitor energy storage inductance power control system for guaranteeing continuous discharge working efficiency, and the capacitor energy storage inductance power control system comprises a silicon controlled rectifier rectifying power supply, a silicon controlled rectifier controller, an anti-reflux diode a, an optical coupling switch a, an adjustable power inductance, an inverter power supply controller, a needle electrode discharge tube, an optical coupling switch b, an anti-reflux diode b and a capacitor bank;
the silicon controlled rectifier power supply is connected with alternating current commercial power, and the silicon controlled rectifier controller controls the rectification output to supply power to the capacitor bank; the capacitance group discharges the needle electrode discharge tube through the series adjustable power inductor, the adjustable power inductor can adjust the inductance to control the discharge time, and the capacitance group realizes the control of power through capacity adjustment and charging voltage adjustment;
the inverter power supply controller can feed back the stored energy after the power inductor works back to the silicon controlled rectifier rectifying power supply for the next capacitor energy storage, and the continuous discharging working efficiency is ensured.
One specific application of this embodiment is:
the method for mass production of graphene by using the joule heating device provided in the second embodiment specifically includes the following steps:
1) Sieving the organic carbon substances and the graphite powder respectively through a 200-400 mesh sieve, and drying until the moisture content is lower than 100ppm; organic carbon materials are organic compounds having a carbon content greater than 50%, including but not limited to: clean coal, coke, acrylic fibers and viscose fibers;
2) Grinding the treated organic carbon material and graphite into powder according to a mass ratio of 3-5: 1 mechanically blending for a period of time, then filling the mixture into a needle electrode discharge tube, compacting two ends of the needle electrode discharge tube by using copper screws of a discharge clamp, and measuring resistance of not more than 1kΩ by using a universal meter;
3) Placing the discharge clamp into a vacuum experimental cabin, and continuously vacuumizing until the target vacuum degree is less than 10Pa;
4) Selecting a capacitor with 100mF total capacity in parallel, adjusting the inductance to 24mH, and performing charge and discharge operation for 2-4 times at 100V under vacuum condition; and charging with 250V voltage, adjusting the inductance to 12mH, and operating a remote controller to perform Joule rapid discharge to obtain the high-quality graphene sediment.
The preferred embodiments of the invention disclosed above are merely helpful in explaining the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (4)
1. The needle electrode discharge tube suitable for the flash Joule heating process is characterized in that: the needle electrode discharge tube (30) comprises an upper electrode (301), an upper tube body (302), a lower tube body (303) and a lower electrode (304), wherein the upper tube body (302) and the lower tube body (303) are open tube bodies, the outer diameter of the upper tube body (302) is matched with the inner diameter of the lower tube body (303), and the outer wall of the upper tube body (302) can be embedded into the inner wall of the lower tube body (303) to form a working discharge space; an upper electrode (301) is arranged at the end part of the upper tube body (302) far away from the opening, a lower electrode (304) is arranged at the end part of the lower tube body (303) far away from the opening, a plurality of needle electrodes (305) which are uniformly distributed in the circumferential direction are formed in the part of the upper electrode (301) and the lower electrode (304) respectively, and the positions of the needle electrodes (305) in the upper electrode (301) and the lower electrode (304) are staggered; the upper pipe body (302) and the lower pipe body (303) are ceramic pipes; the needle electrode (305) is a platinum electrode.
2. The joule heating equipment suitable for the flash joule heating process is characterized in that: the Joule heating device comprises a cart type rack (01), wherein a parallel capacitor group (02) is arranged at the lower layer in the cart type rack (01);
a vacuum pump (03), a direct-current contactor (04), an adjustable power inductor (05), a power resistor (06), a freewheel diode (07), a silicon controlled rectifier power supply (08) and a low-voltage switching power supply (09) are arranged at the middle layer in the cart type rack (01); one end of an electrode of the direct current contactor (04) is connected with the positive electrode of the parallel capacitor group (02) through a wire, and the other end of the electrode is connected with the adjustable power inductor (05) through a wire; the adjustable power inductor (05) is a power inductor with an inductance value adjustable according to the discharge time requirement, and two ends of the adjustable power inductor are connected with a power resistor (06) and a freewheeling diode (07) protection circuit in parallel;
a vacuum experiment cabin (10) is arranged on the upper layer inside the cart type stand (01), and a needle electrode discharge tube (30) as claimed in claim 1 is arranged inside the vacuum experiment cabin (10) through a discharge clamp (11);
the Joule heating equipment is provided with a capacitor energy storage inductance power control system for guaranteeing continuous discharge working efficiency, and the capacitor energy storage inductance power control system comprises a silicon controlled rectifier power supply, a silicon controlled rectifier controller, an anti-reflux diode a, an optical coupling switch a, an adjustable power inductance, an inverter power supply controller, a needle electrode discharge tube, an optical coupling switch b, an anti-reflux diode b and a capacitor group;
the thyristor rectifier power supply (08) provides charging current for the parallel capacitor group (02), and the low-voltage switch power supply (09) provides control power for the whole equipment;
a circuit breaker (18), a voltmeter (19), an ammeter (20) and an indicator lamp (21) are arranged above the back of the cart type stand (01), and a quick discharge switch (22), a two-way remote control switch (23) and a potentiometer (24) are arranged below the back of the cart type stand (01);
the circuit breaker (18) provides power supply on-off for the whole equipment; the voltmeter (19) is connected in parallel with two poles of the parallel capacitor group (02) and is used for measuring the voltage of the parallel capacitor group (02);
the ammeter (20) is connected in series with the output end of the thyristor rectification power supply (08) and is used for measuring the charging current of the thyristor rectification power supply (08) to the parallel capacitor group (02);
the indicator lamp (21) is a small incandescent lamp and is connected in parallel with two poles of the parallel capacitor group (02), and the energy storage condition of the parallel capacitor group (02) is indicated in an auxiliary mode;
the rapid discharging switch (22) is connected with a power resistor in series, and the rapid discharging switch (22) is connected with two poles of the parallel capacitor group (02) and is used for rapidly discharging the residual electric energy in the parallel capacitor group (02);
one path of the two-path remote control switch (23) is connected with a power supply interface of the silicon controlled rectifier power supply (08) and used for controlling the start and stop of the silicon controlled rectifier power supply (08), and the other path of the two-path remote control switch is connected with a control end of the direct current contactor (04) and used for controlling the on-off of the direct current contactor (04);
the potentiometer (24) is connected to a control interface of the silicon controlled rectifier power supply (08) and is used for controlling the output current of the silicon controlled rectifier power supply (08);
the discharging clamp (11) consists of a bottom plate (25), a sliding block (26), a screw support (27), a copper screw (28) and a spring (29), wherein the sliding block (26) is installed on the bottom plate (25), the sliding block (26) can slide left and right freely and can be locked at any position on the bottom plate, the screw support (27) is fixed on the sliding block (26), the copper screw (28) is installed on the screw support (27), the spring (29) is installed on the copper screw (28), the copper screw (28) is of a bilateral symmetry structure, and a needle electrode discharging tube (30) is borne in the middle;
the silicon controlled rectifier power supply is connected with alternating current commercial power, and the silicon controlled rectifier controller controls the rectification output to supply power to the capacitor bank; the capacitance group discharges the needle electrode discharge tube through the series adjustable power inductor, the adjustable power inductor can adjust the inductance to control the discharge time, and the capacitance group realizes the control of power through capacity adjustment and the adjustment of the charging voltage;
the inverter power supply controller can feed back the stored energy after the power inductor works to the silicon controlled rectifier rectifying power supply for the next capacitor energy storage.
3. The joule heating apparatus suitable for use in a flash joule heating process as claimed in claim 2, wherein: and each electrode of the parallel capacitor group (02) is provided with a bleeder resistor (12) in parallel, the negative electrode of the parallel capacitor group (02) is connected to a negative electrode interface (13) of the vacuum experiment cabin (10) through a wire, and the output end of the adjustable power inductor (05) is connected to a positive electrode interface (17) of the vacuum experiment cabin (10) through a wire.
4. The joule heating apparatus suitable for use in a flash joule heating process as claimed in claim 2, wherein: the vacuum pump (03) is connected to the upper cover of the vacuum experiment cabin (10) through a vacuum pipeline (14), the vacuum pump (03) provides a vacuum environment for the inside of the vacuum experiment cabin (10), and the upper cover of the vacuum experiment cabin (10) is provided with a vacuum pressure gauge (15) and an air inlet valve (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211246942.9A CN115318219B (en) | 2022-10-12 | 2022-10-12 | Needle electrode discharge tube suitable for flash Joule heating process and Joule heating equipment |
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| CN101102909A (en) * | 2004-12-23 | 2008-01-09 | 兰姆研究公司 | Methods for removing black silicon and black silicon carbide from surfaces of silicon and silicon carbide electrodes for plasma processing apparatuses |
| CN201570154U (en) * | 2009-06-18 | 2010-09-01 | 浙江科技学院 | DC glow discharge plasma and cold-cathode fluorescent tube experimental facility |
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| CN115318219A (en) | 2022-11-11 |
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